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Climate in Bellingham (Washington_state)


Average weather, temperature, rainfall, sunshine hours

Flag - United States

Bellingham, where it's located


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Climate chart - Bellingham
The climate of Bellingham is sub-oceanic, with quite mild, rainy winters and mild, fairly sunny summers.
The city overlooks Bellingham Bay, which then opens onto the Strait of Georgia, where we find the San Juan Islands and then the Canadian island of Vancouver. We are in the far northwest of the United States, in Washington state, 25 km (15 mi) from the Canadian border. The Canadian city of Vancouver is located 65 km (40 mi) to the northwest. To the east, we find the mountains of the Mount Baker Ski Area.
Precipitation is not very abundant, though it is very frequent in the cold half of the year.
The wind is frequent: during mild and rainy periods, the wind blows from the strait of Juan de Fuca, while during cold air outbreaks, it blows from the northeast after being channeled into the the Fraser River valley.
Bellingham is the least sunny city in the whole of the United States, although there's no big difference with Seattle and the other cities of the Puget Sound.

Bellingham

Although the winter is mild enough, there can sometimes be cold waves, sometimes even in November, with night temperatures going down to -10 °C (14 °F) or even below. For example, the temperature dropped to -18 °C (0 °F) in January 1950, to -15 °C (5 °F) in November 1955 and November 1985, and to -15.5 °C (4 °F) in February 1989.
Snow is quite rare: on average, 16 centimeters (6.5 in) per year. However, a fairly heavy snowfall can occur from time to time.

In summer, daytime temperatures are generally mild or pleasantly warm. However, there may also be hot periods, which last a few days, with highs of 32/33 °C (89/91 °F), and sometimes more. Generally, the heat is less intense than in Seattle, as we are more to the north. However, in July 2009, the temperature reached 36 °C (97 °F). In 2021, the temperature reached 37 °C (99 °F) in late June and 38 °C (100 °F) in August.

Best Time


The best time to visit Bellingham is summer, especially in July and August, since it is the mildest, driest and sunniest period of the year. June and September are also acceptable months.

Bellingham - Climate data


In Bellingham, the average temperature of the coldest month (December) is of 4,3 °C, that of the warmest month (August) is of 17,7 °C. Here are the average temperatures.
Bellingham - Average temperatures (1991-2020)
Temperatures (°C)
MonthMinMaxMean
January1,17,94,5
February1,49,45,4
March3,111,67,3
April5,314,39,8
May8,317,713
June1119,915,4
July12,822,617,7
August12,622,817,7
September9,820,114,9
October6,214,910,6
November3,310,66,9
December1,27,54,3
Year6,41510,65

Precipitation amounts to 880 millimeters per year: so, it is at an intermediate level. It ranges from 20 millimeters in the driest month (July) to 130 millimeters in the wettest one (November). Here is the average precipitation.
Bellingham - Average precipitation
MonthRain (mm)Days
January11519
February7016
March8518
April7016
May5512
June4010
July206
August306
September5011
October10016
November13020
December11019
Year880168

The sea temperature ranges from 7,5 °C in January, February to 13,5 °C in July, August. Here are the average sea temperatures.
Bellingham - Sea temperature
MonthTemperatures (°C)
January7,5
February7,5
March8
April9
May11
June12,5
July13,5
August13,5
September13
October11
November9,5">
December8,5
Year10,4

There are on average around 1865 sunshine hours per year. Here are the average hours of sunshine per day.
Bellingham - Sunshine hours
MonthAverageTotal
January260
February385
March4125
April6180
May7215
June8240
July9280
August8250
September6185
October4125
November260
December260
Year5,11865

Bellingham - Weather by month

Based on the period 1991-2020
(January - February - March - April - May - June - July - August - September - October - November - December)


January is generally a quite cold month. The average temperature is of 4,5 °C, with a minimum of 1,1 °C and a maximum of 7,9 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -7 °C. However, it dropped to -12,3 °C in January 1996.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 14 °C. However, it reached 18,3 °C in January 2010.
Rain iconPrecipitation amounts to 115 mm, distributed over 19 days.
The day lasts on average 8 hours and 50 minutes.
Sun iconThere are on average 2 hours of sunshine per day. So, the sun shines 23% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is of 13,4 kph.
Sea iconThe average sea temperature is of 7,7 °C. Therefore, the sea is very cold for swimming.


February is generally a quite cold month. The average temperature is of 5,4 °C, with a minimum of 1,4 °C and a maximum of 9,4 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -5 °C. However, it dropped to -9,4 °C in February 2019.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 14,5 °C. However, it reached 21,7 °C in February 2012.
Rain iconPrecipitation amounts to 70 mm, distributed over 16 days.
The day lasts on average 10 hours and 10 minutes.
Sun iconThere are on average 3 hours of sunshine per day. So, the sun shines 30% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is of 12,6 kph.
Sea iconThe average sea temperature is of 7,6 °C. Therefore, the sea is very cold for swimming.


March is generally a quite mild month. The average temperature is of 7,3 °C, with a minimum of 3,1 °C and a maximum of 11,6 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -3 °C. However, it dropped to -7 °C in March 2002.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 17,5 °C. However, it reached 24,4 °C in March 2004.
Rain iconPrecipitation amounts to 85 mm, distributed over 18 days.
The day lasts on average 12 hours and 0 minutes.
Sun iconThere are on average 4 hours of sunshine per day. So, the sun shines 33% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is of 12,9 kph.
Sea iconThe average sea temperature is of 8,1 °C. Therefore, the sea is very cold for swimming.


April is generally a mild month. The average temperature is of 9,8 °C, with a minimum of 5,3 °C and a maximum of 14,3 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 0 °C. However, it dropped to -3,3 °C in April 2008.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 22 °C. However, it reached 28,3 °C in April 2016.
Rain iconPrecipitation amounts to 70 mm, distributed over 16 days.
The day lasts on average 13 hours and 50 minutes.
Sun iconThere are on average 6 hours of sunshine per day. So, the sun shines 43% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is of 11,4 kph.
Sea iconThe average sea temperature is of 9,2 °C. Therefore, the sea is very cold for swimming.


May is generally a mild month. The average temperature is of 13 °C, with a minimum of 8,3 °C and a maximum of 17,7 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 2,5 °C. However, it dropped to -0,6 °C in May 1999.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 25 °C. However, it reached 30 °C in May 2016.
Rain iconPrecipitation amounts to 55 mm, distributed over 12 days.
The day lasts on average 15 hours and 20 minutes.
Sun iconThere are on average 7 hours of sunshine per day. So, the sun shines 46% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is of 11 kph.
Sea iconThe average sea temperature is of 11 °C. Therefore, the sea is very cold for swimming.


June is generally a very mild month. The average temperature is of 15,4 °C, with a minimum of 11 °C and a maximum of 19,9 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 6,5 °C. However, it dropped to 2,8 °C in June 1999.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 27 °C. However, it reached 31,1 °C in June 1995.
Rain iconPrecipitation amounts to 40 mm, distributed over 10 days.
The day lasts on average 16 hours and 5 minutes. June 21, the winter solstice, is the shortest day of the year in the Southern Hemisphere.
Sun iconThere are on average 8 hours of sunshine per day. So, the sun shines 50% of the time.
The average humidity is 73%. Hence, the air is normally humid.
The average wind speed is of 12 kph.
Sea iconThe average sea temperature is of 12,6 °C. Therefore, the sea is very cold for swimming.


July is generally a very mild month. The average temperature is of 17,7 °C, with a minimum of 12,8 °C and a maximum of 22,6 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 8,5 °C. However, it dropped to 5 °C in July 2000.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 29,5 °C. However, it reached 36 °C in July 2009.
Rain iconPrecipitation amounts to 20 mm, distributed over 6 days.
The day lasts on average 15 hours and 35 minutes.
Sun iconThere are on average 9 hours of sunshine per day. So, the sun shines 58% of the time.
The average humidity is 72%. Hence, the air is normally humid.
The average wind speed is of 12 kph.
Sea iconThe average sea temperature is of 13,5 °C. Therefore, the sea is very cold for swimming.


August, the warmest month of the year, is generally a very mild month. The average temperature is of 17,7 °C, with a minimum of 12,6 °C and a maximum of 22,8 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 8 °C. However, it dropped to 5 °C in August 2000.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 29 °C. However, it reached 32,2 °C in August 1993.
Rain iconPrecipitation amounts to 30 mm, distributed over 6 days.
The day lasts on average 14 hours and 10 minutes.
Sun iconThere are on average 8 hours of sunshine per day. So, the sun shines 56% of the time.
The average humidity is 74%. Hence, the air is normally humid.
The average wind speed is of 10,9 kph.
Sea iconThe average sea temperature is of 13,7 °C. Therefore, the sea is very cold for swimming.


September is generally a very mild month. The average temperature is of 14,9 °C, with a minimum of 9,8 °C and a maximum of 20,1 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around 4 °C. However, it dropped to 0,6 °C in September 2000.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 26,5 °C. However, it reached 31 °C in September 2003.
Rain iconPrecipitation amounts to 50 mm, distributed over 11 days.
The day lasts on average 12 hours and 30 minutes.
Sun iconThere are on average 6 hours of sunshine per day. So, the sun shines 50% of the time.
The average humidity is 78%. Hence, the air is normally humid.
The average wind speed is of 8,6 kph.
Sea iconThe average sea temperature is of 12,8 °C. Therefore, the sea is very cold for swimming.


October is generally a mild month. The average temperature is of 10,6 °C, with a minimum of 6,2 °C and a maximum of 14,9 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -0,5 °C. However, it dropped to -5,6 °C in October 2002.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 21 °C. However, it reached 24,4 °C in October 2020.
Rain iconPrecipitation amounts to 100 mm, distributed over 16 days.
The day lasts on average 10 hours and 40 minutes.
Sun iconThere are on average 4 hours of sunshine per day. So, the sun shines 38% of the time.
The average humidity is 80%. Hence, the air is normally humid.
The average wind speed is of 9,7 kph.
Sea iconThe average sea temperature is of 10,8 °C. Therefore, the sea is very cold for swimming.


November is generally a quite mild month. The average temperature is of 6,9 °C, with a minimum of 3,3 °C and a maximum of 10,6 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -4,5 °C. However, it dropped to -11,1 °C in November 2006.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 16,5 °C. However, it reached 22,8 °C in November 2016.
Rain iconPrecipitation amounts to 130 mm, distributed over 20 days.
The day lasts on average 9 hours and 5 minutes.
Sun iconThere are on average 2 hours of sunshine per day. So, the sun shines 22% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is of 12,6 kph.
Sea iconThe average sea temperature is of 9,4 °C. Therefore, the sea is very cold for swimming.


December, the coldest month of the year, is generally a quite cold month. The average temperature is of 4,3 °C, with a minimum of 1,2 °C and a maximum of 7,5 °C.
Cold thermometer iconOn the coldest nights of the month, the temperature usually drops to around -6,5 °C. However, it dropped to -12,2 °C in December 1998.
Warm thermometer iconOn the warmest days of the month, the temperature usually reaches around 14 °C. However, it reached 19,4 °C in December 2014.
Rain iconPrecipitation amounts to 110 mm, distributed over 19 days.
The day lasts on average 8 hours and 20 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
Sun iconThere are on average 2 hours of sunshine per day. So, the sun shines 24% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is of 13,1 kph.
Sea iconThe average sea temperature is of 8,3 °C. Therefore, the sea is very cold for swimming.

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